<p>150/151 is harder than 140/141, but those who have done some calculus can easily be fooled early in the class into thinking it’ll be easy because they have seen some of the stuff. </p>
<p>Listen to bittersweet28, if they gave you credits for 140, take the 141/222 route (the latter if you need cal 3, but I think most science programs do). 150 is probably more deceptive if you’ve already seen some differentiation than 141 is for those who have seen some integration.</p>
<p>And KEITHRO: I’m certain calc AB doesn’t cover 141, and I’m not entirely sure it covers 140 properly but I guess it should be sufficient preparation for 141. As for 150 being the worst class from a TA’s perspective: most student who take 150 have already been through a class on single variable differential calculus. For the first 2/3 of the class, there is nothing really new, just a little bit more depth and rigour. So it’s very hard to keep the students’ attention, not to mention keeping them motivated to do certain types of exercises like taking a derivative using limits when they already know the shorthand formulae. And because the students have seen the stuff already and are not motivated, there’s a higher tendency not to prepare well for the midterm, point at which many realize 150 is actually a challenging course. Then the TAs have to deal with all the kids who are not happy with that kind of bad surprise.</p>